Device for cooling piston-rods



DEVICE FOR COOLING PISTON RODS.

APPLIOATION FILED MAY 13, 1903.

NO MODEL.

UNITED STATES Patented February 9, 1904.

TAYLOR MATSON, OF PHILADELPHIA, PENNSYLVANIA.

DEVICE FOR COOLING PISTON-RODS.

SPECIFICATION forming part of Letters Patent N0."751,802, dated February9, 1904. Application filed May 13, 1903' Serial No. 156,897. (No model.)

To all whom it may concern:

Be it known that I, TAYLOR I\IATSON, a citi- Zen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Devices for CoolingPiston- Rods, of which the following is a specification.

My invention relates to the pistons used in explosion-engines; anditconsists of means for preventing the overheating of such pistons.

It further consists of novel details of construction, all as will behereinafter set forth.

Figure 1 represents a partial elevation and partial vertical section ofan explosion-engine embodying my invention. Fig. 2 represents inelevation a detached piston.

Similar letters of reference indicate corresponding parts in thefigures.

Referring to the drawings, A designates the base of an explosion-engine,mounted on which is a cylinder B, above and in alinement with which is asecond cylinder C. These cylinders are provided with the usual ports Dand E, threaded for connection with pipes for the introduction of theexplosive mixture, and with ports F and G for the igniting devices. Thelower piston H is connected by the rod K to the ordinary crank-sh aft Lof the engine. Passing through the head M between the cylinders B and Cis a tubular piston-rod N, the bore P of which opens to the atmosphereat its free end below the piston H. Near the upper end of the rod N,where it is secured to the upper piston R, are lateral aperturesS,leading to the bore P. A port T on the wall of the base A serves toadmit air.

The operation is as follows: The engine shown is of the tandem-cylinderfour-cycle type, in which explosions are simultaneously produced in bothcylinders above the pistons H and B, respectively. The passage of thepistonrod N through the lower explosion-chamber B tends to heat it,thereby causing it to cut its stuffing-box. In my device each returnstroke of the pistons draws air through the portT and base A up throughthe bore P of the piston-rod, such air discharging through the aperturesS into the dead end of the cylinder C. The next forward stroke eXpelsthis air from the cylinder, again forcing it through the rod N.

Ihave shown in dotted lines, Fig. 1, that, if desired, the tubular rod Nmay be carried up through the head of the cylinder 0 and there be opento the atmosphere.

It is evident that the large volume of free air passing several hundredtimes per minute through the rod will fully prevent its heating and thatsuch air will also act to cool the end of the cylinder to which it isadmitted.

By the term free end as applied to a piston-rod the end of said rodwhich extends out of the cylinder into the atmosphere is obviouslymeant. A

It will be evident that various changes may be made by those skilled inthe art which will come within the scope of my invention, and I do not,therefore, desire to be limited in every instance to the exactconstruction herein shown and described as, for instance, to thefourcycle type of engine.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an explosion-engine, a cylinder, heads in said cylinder, a piston,means for producing an explosion in said cylinder at one side of saidpiston, a piston-rod secured to the other side of said piston, saidpiston-rod having a bore opening adjacent its ends, whereby air isadmitted to the end of said cylinder in which no explosion occurs.

2. In a single-acting explosion-engine, a cylinder, a piston, a crank, atubular piston-rod by which motion is communicated from said piston tosaid crank, .the bore of said rod being open at its free end and meansforming a lateral passage from said bore within said cylinder, wherebyair is admitted to the end of said cylinder in which no explosionoccurs.

3. In a single-acting tandem explosion-engine, a plurality of cylinders,pistons in said cylinders, a tubular piston-rod connecting said pistons,the bore of said rod being open to the air at its free end and meansforming a lateral passage communicating with said bore, Whereby air isadmitted to the interior of said cylinder at the end in which noexplosion occurs.

4. In an engine, a cylinder, heads at each end of said cylinder, apiston, a tubular pistonrod open adjacent its outer and inner ends andmeans forming a lateral passage opening from H 6. In a tandemexplosion-engine, means for the bore of said rod, whereby air isadmitted the admission of air to one of the cylinders, an to the end ofsaid cylinder in which no exploaperture through the head of the pistonin sion occurs. said cylinder, a tubular rod connecting the pis- 5. In atandem eXplosion-engine,a tubular tons and an aperture connected withthe bore 5 rod connecting the pistons, the bore of said rod of said rodWithin the other of said cylinders.

open to the atmosphere through one piston and TAYLOR M ATSON. to the endof the other cylinder in which no Witnesses: explosion occurs through anaperture adjacent JOHN A. WIEDERSHEIM,

10 the piston therein. C. D. MoVAY.

